A mechanic friend once demonstrated the amazing abilities of Coke Cola, to unseized stuck pistons, on a FORD Granada engine. He filled each cylinder, after removing the head, with Coke Cola, on a Friday and by Monday, the engine could be easily turned over by holding the flywheel with his hands. Previously, with two of us pulling on an attached steel bar, the engine had been stuck solid. Phosphoric Acid, found in Coke Cola & Doctor Pepper, dissolves rust, oil gunge and other engine crud, very effectively.
If that's the case I doubt you're looking at simple ring to bore stickiness. Acetone and ATF 50:50 has always been the best easing oil I've found but that's on stuck stationary engines with iron barrels that don't have the degree of rubber/synthetic seals that acetone can beat up. I'm thinking it's had water ingress through an open valve and you've got a seized crank. They're not difficult to strip and it'll probably be quicker than pouring gawd knows what down the plug 'oles and crossing your fingers. At least you'll know.
I think it is needing a refresh, the bike needs some work but will be awesome when up and running!! Take it apart freshen things up ( clean and check ) reassemble; enjoy!!
Kick start has quite an increase in ratio to turn the engine so removing the generator cover and using a breaker bar directly on the crank end bolt will apply much more effort to the seized parts. The worst siezed pistons i have seen were totally fused to the bores and required the conrods cutting to get the motor apart. With the price of parts today a replacement engine is your best bet!
1, Acetone + hydraulic fluid 50/50 mix. Leave 24h. 2, case cover off, big spanner on crank backwards and forwards , a LOT of heat on barrels, plumbers gas bottles too weak, go oxy, you have to get the steel liners quite hot inside. ( from experience)
If you are 100% certain the bike turned over when you purchased it, I think that flooding the bores is not going to help. It may be that a piston ring has broken or the crank has seized once debris has been lifted from the sump and into the journals. I would get a borascope in the spark plug hole first and then try to get the head off to determine whether it is a piston issue or a crank issue. Fingers crossed for piston ring issue because a crank issue will probably make the repair not financially viable. Hope this helps! Oh. before you do that have you tried to see if the engine turns backwards? There could be debris on top of the piston, not allowing the engine to do a full rotation.
Drain the crankcase, then go get some AE Half and Half, a 50/50 of milk and cream. I know it sounds strange, but I've used it on several stuck engines, and it has always got them broken free. Try it and see. What do you have to lose ?
I would at least pull the top cover to see what kinda shape the value train is in and scope the cylinders. If the top end is all rusted up you're probably wasting time. JS
Looking forward to seeing it run! Good luck!
A mechanic friend once demonstrated the amazing abilities of Coke Cola, to unseized stuck pistons, on a FORD Granada engine. He filled each cylinder, after removing the head, with Coke Cola, on a Friday and by Monday, the engine could be easily turned over by holding the flywheel with his hands. Previously, with two of us pulling on an attached steel bar, the engine had been stuck solid.
Phosphoric Acid, found in Coke Cola & Doctor Pepper, dissolves rust, oil gunge and other engine crud, very effectively.
If that's the case I doubt you're looking at simple ring to bore stickiness. Acetone and ATF 50:50 has always been the best easing oil I've found but that's on stuck stationary engines with iron barrels that don't have the degree of rubber/synthetic seals that acetone can beat up. I'm thinking it's had water ingress through an open valve and you've got a seized crank. They're not difficult to strip and it'll probably be quicker than pouring gawd knows what down the plug 'oles and crossing your fingers. At least you'll know.
Seized crank. unless you specifically want something to do over the winter, bin it and get a 400SD motor from a breakers.
I hope you get it running mate. Get to the pub and have some beers and things won’t seem as bad👍
I think it is needing a refresh, the bike needs some work but will be awesome when up and running!! Take it apart freshen things up ( clean and check ) reassemble; enjoy!!
Rusted distribution chain?
Any update? Did you get it unseized?
@anonhunter5191 yes got it turning over and sold
Kick start has quite an increase in ratio to turn the engine so removing the generator cover and using a breaker bar directly on the crank end bolt will apply much more effort to the seized parts. The worst siezed pistons i have seen were totally fused to the bores and required the conrods cutting to get the motor apart. With the price of parts today a replacement engine is your best bet!
@@MrTench8 yes all sorted now turning over well
1, Acetone + hydraulic fluid 50/50 mix. Leave 24h.
2, case cover off, big spanner on crank backwards and forwards , a LOT of heat on barrels, plumbers gas bottles too weak, go oxy, you have to get the steel liners quite hot inside.
( from experience)
If you are 100% certain the bike turned over when you purchased it, I think that flooding the bores is not going to help. It may be that a piston ring has broken or the crank has seized once debris has been lifted from the sump and into the journals. I would get a borascope in the spark plug hole first and then try to get the head off to determine whether it is a piston issue or a crank issue. Fingers crossed for piston ring issue because a crank issue will probably make the repair not financially viable. Hope this helps! Oh. before you do that have you tried to see if the engine turns backwards? There could be debris on top of the piston, not allowing the engine to do a full rotation.
Drain the crankcase, then go get some AE Half and Half, a 50/50 of milk and cream. I know it sounds strange, but I've used it on several stuck engines, and it has always got them broken free. Try it and see. What do you have to lose ?
Even if you can get it turning you will be stripping the engine and replacing big parts, the easier rout would be to try and find another engine.
I would at least pull the top cover to see what kinda shape the value train is in and scope the cylinders. If the top end is all rusted up you're probably wasting time. JS
stick it in high gear and rock the bike backwards and forwards
@JOOLZNED Done but will try again now it's had chemical
Rust remover contains acid, not good.